In the universe, free energy (zero point energy) is a given. That's not surprising, because everything is energy, as Einstein already discovered (E = mc2). And every form of energy can be converted into another form of energy (electricity for example), by adjusting the frequency on which the energy moves. That's because the basic energy for every element is the same, namely the energy of light/love. Just like you can break down a little house of lego and make a little puppet out of it.

It basically keeps your menu (rec, fac, unit) open after selecting something instead of closing it. So for example if you order a truck to service something with shift it will leave the list of things to be serviced open, and you dont need to select the truck again.